Hi Cassie!
Welcome to the Disney Parks Moms Panel! Rest assured, you should not need to pay for parking at both the theme park and at
Disney's Beach Club Resort Based on my own personal experience, you should only need to pay for parking at the theme park.
If you will be visiting Disney's Hollywood Studios or Epcot that day and anticipate being finished with dinner prior to park closing, you could always leave your car in the parking lot at the theme park and either walk or take the ferry boat to Disney's Beach Club Resort. If you will be visiting one of the other theme parks or have a late Advanced Dining Reservation, I recommend driving to Disney's Beach Club Resort. When you arrive at the resort's security gate, simply let the cast member know you have an Advanced Dining Reservation at
Beaches & Cream Soda Shop, and he/she will direct you to Self-Parking.
I hope this information is helpful. If you have any additional questions, please don't hesitate to visit us again. Best wishes for a magical trip, Cassie!
Happy Travels
Jodie